Roketa 54B Clutch Grab Low RPM's By Saber (Read 989 times)

[Saber]

Okay as I have read about all the clutch issues with the 250 this one seems to be opposite.
I am about to buy a friends Roketa 54B with the honda Clone 250. It has always had an issue with the clutch, I've sanded it I've cleaned the bell but nothing seems to fix the issue of very LOW RPM grabbing. The bike idles around 1800 to 2000 but if you give it the slightest throttle the bike starts to go you hear the belt chirp as it slips and pops around the pulley and it jerks it until about 5MPH. Once moving there is no clutch slip no issues drives nice up to 65MPH. So this isn't a slip issue this is a grabbing issue. So I am trying to figure out why does this clutch grab so quickly and at such low RPM's.
My experience is with Gy6 150's and my 150 grabbed around 2800Rpm

My only thought now is "Does It just have a defunct Clutch assembly and should I Just swap the whole thing and start over"?

Also I know great places to buy parts for my 150 but they don't sale parts for 250. Who is good reliable and trusted?

[richardthescooter3]

I'm just wondering if they put a wrong belt on that scoot

[fflintstone]

Yup,could be the wrong belt,makes it grab,or someone did have an issue with oil getting on the pulley...a mystery--good luck with that ,maybe someone will come up with something more definite --fflintstone

[alleyoop]

If you need higher rpms for the clutch to grab, get 1000 rated Clutch springs. The OEM clutch springs are rated at 700-800. So putting in 1000 rated spring will require higher RPMS to have the CLUTCH PADS thrown out before they grab. The problem is the weight it has to initially move you need a little more RPMS. Many folks with 250+ scoots have the problem because they baby them when starting off and either the Clutch Slips or the belt slips. Another problem could be is the the person before you put in a STRONGER CONTRA SPRING and the belt is slipping in the VARIATOR.
So look to see what COLOR the SPRING is between the CLUTCH PULLEY, if it is COLORED then it has a stronger CONTRA SPRING. Same with the CLUTCH SPRINGS if they colored yellow, red, blue etc and not metal looking they have been replaced.
Alleyoop

[Saber]

The belt length is 1000. It does have a yellow contra spring in it. And it has 18 gram sliders. I might switch everything back to stock and give it a try??

[Saber]

Okay I got the scooter yesterday a few corrections it has a blue spring with the 18 gram sliders. Also while riding the clutch grabs at 2000 Rpms it idles at 1500. And when the clutch grabs it grabs and slips until you reach about 2800 rpms. Also it's the jonway version of the 54b. Hope this helps.

[skyrider]

Saber, there has been quite a few posts on this problem with the Honda clones. It seems to be a chronic problem with them. The one that I had did the same thing. I accidentally found the solution by accident. I put a few drops of 90 wt gear oil on the needle bearing of the clutch and a couple of drops apparently got on the clutch bell/pads. From that point on it was smooth as silk. It took hold smoothly and did not slip, worked perfectly and never grabbed again. It was a violent stutter/shudder until it got past that point. (It developed a rather major engine problem and I got rid of it, Doug has it now.) I purchased a real Honda Reflex and there is no comparison.

[alleyoop]

I sort of thought the springs had been changed, now it makes since. Just so you know the BLUE SPRINGS are rated at 2000 which is a heck of a lot of pressure on the belt and I bet the belt is slipping in the VARIATOR trying to pull the Clutch Pulley apart so the belt moves down.
Alleyoop

[Saber]

So Blue is 2000 now I thought that was the RED ones Alleyoop? Im back to being a newbee GREEN HORN again. I know so much about the gy6 150 but some of that knowledge is being put on its head. I asked my buddy who gave me the scooter if he had the original contra spring he said he needed to look for it. I did get the OEM 21 gram rollers though.
Skyrider your right it is very violent on take off. I wait for traffic in front of me to get going and I just gun it. Maybe thats a bad idea but I don't feel like the bull is going to buck me off when I do that.